1,248 research outputs found
Assessment of Muscle Contractile Properties at Acute Moderate Altitude Through Tensiomyography
No full textMorales-Artacho, Antonio J., Paulino Padial, Dario Rodriguez-Matoso, David Rodriguez-Ruiz, Amador Garcia-Ramos, Juan Manuel Garcia-Manso, Carmen Calderon, and Belen Feriche. Assessment of muscle contractile properties at acute moderate altitude through tensiomyography. High Alt Biol Med 16:343-349, 2015.Under hypoxia, alterations in muscle contractile properties and faster fatigue development have been reported. This study investigated the efficacy of tensiomyography (TMG) in assessing muscle contractile function at acute moderate altitude. Biceps femoris (BF) and vastus lateralis (VL) muscles of 18 athletes (age 20.1 +/- 6.1 years; body mass 65.4 +/- 13.9kg; height 174.6 +/- 9.5cm) were assessed at sea level and moderate altitude using electrically evoked contractions on two consecutive days. Maximum radial displacement (Dm), time of contraction (Tc), reaction time (Td), sustained contraction time (Ts), and relaxation time (Tr) were recorded at 40, 60, 80, and 100mA. At altitude, VL showed lower Dm values at 40mA (p=0.008; ES=-0.237). Biceps femoris showed Dm decrements in all electrical stimulations (p0.61). In VL, Tc was longer at altitude at 40 (p=0.031, ES=0.56), and 100mA (p=0.03, ES=0.51). Regarding Td, VL showed significant increases in all electrical intensities under hypoxia (p0.03, ES 0.33). TMG appears effective at detecting slight changes in the muscle contractile properties at moderate altitude. Further research involving TMG along with other muscle function assessment methods is needed to provide additional insight into peripheral neuromuscular alterations at moderate altitude.3493430,7781,525Q1Q2SCI
Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar
No full textLa densificación es una alternativa para aprovechar los residuos agroforestales. Así el objetivo del presente estudio fue caracterizar la calidad de la materia prima y briquetas producidas a partir de residuos de bagazo de caña de azúcar y cáscara de piñón manso (Jatropha curcas) en diferentes proporciones. La biomasa fue secada y ajustada al 12 % de humedad y en seguida preparados los tratamientos: T1- 100 % bagazo de caña de azúcar, T2- 100 % cáscara de piñón manso, T3- 75 % de bagazo de caña de azúcar + 25 % cáscara de piñón manso, T4- 75 % cáscara de piñón manso + 25 % bagazo de caña de azúcar y T5- 50 % bagazo de caña de azúcar + 50 % de cáscara de piñón manso. Las briquetas fueron producidas con la ayuda de una briquetadera hidráulica a temperatura de 80 ± 2 °C y presión de 140 kgf cm-2, durante cinco minutos. Se analizó densidad aparente, densidad energética, expansión volumétrica, resistencia dinámica y resistencia a la tracción por comprensión diametral. Briquetas confeccionadas con 100 % de cáscara de piñón manso presentaron mayor densidad energética, fueron más resistentes a la prueba de resistencia dinámica y a la tracción por compresión diametral, aunque presentaron mayor expansión volumétrica en relación a las briquetas con 50 % de bagazo de caña de azúcar + 50 % de cáscara de piñón manso
A model for competitiveness level analysis in sports competitions : application to basketball
No full textThe degree of overall competitiveness of a sport league is a complex phenomenon. It is difficult to assess and quantify all elements that yield the final standing. In this paper, we analyze the general behavior of the result matrices of each season and we use the corresponding results as a probably density. Thus, the results of previous seasons are a way to investigate the probability that each team has to reach a certain number of victories. We developed a model based on Shannon entropy using two extreme competitive structures (a hierarchical structure and a random structure), and applied this model to investigate the competitiveness of two of the best professional basketball leagues: the NBA (USA) and the ACB (Spain). Both leagues' entropy levels are high (NBA mean 0.983; ACB mean 0.980), indicating high competitiveness, although the entropy of the ACB (from 0.986 to 0.972) demonstrated more seasonal variability than that of the NBA (from 0.985 to 0.990), a possible result of greater sporting gradients in the ACB. The use of this methodology has proven useful for investigating the competitiveness of sports leagues as well as their underlying variability across time. (C) 2012 Elsevier B.V. All rights reserved
Producción de briquetas con residuos de cáscara de piñón manso (Jatropha curcas) y bagazo de caña de azúcar
No full textOne of the alternatives to benefit the agroforestry residues is by densification processes. Thus, the goal of this analysis was to evaluate the raw material and briquettes quality produced from the remains of the sugarcane bagasse and Jatropha curcas shell. The biomass was dried and set at 12% of moisture content and, afterwards, had the treatments prepared. T1 – 100 % sugar cane bagasse; T2 – 100 % Jatropha curcas shell; T3 – 75 % sugar cane bagasse + 25 % Jatropha curcas shell; T4 – 75 % Jatropha curcas shell + 25 % sugar cane bagasse; and T5 – 50 % sugar cane bagasse + 50 % Jatropha curcas shell. The briquettes were produced with the assistance of a hydraulic briquette machine at temperature of 80 ± 2 ºC and pressure of 140 kgf cm-2, kept for a period of five minutes. The main energy and physic mechanical aspects of the briquettes were bulk density, energy density, volumetric expansion, dynamic resistance and tensile strength by diametric compression. It was confirmed that the briquettes produced from 100 % Jatropha curcas shell showed superior energy density, they were also more resistant to tensile strength by diametric compression and to the dynamic resistance test, they even presented higher volumetric expansion compared to the ones produced from 50 % sugarcane bagasse + 50 % Jatropha curcas shell.La densificación es una alternativa para aprovechar los residuos agroforestales. Así el objetivo del presente estudio fue caracterizar la calidad de la materia prima y briquetas producidas a partir de residuos de bagazo de caña de azúcar y cáscara de piñón manso (Jatropha curcas) en diferentes proporciones. La biomasa fue secada y ajustada al 12 % de humedad y en seguida preparados los tratamientos: T1- 100 % bagazo de caña de azúcar, T2- 100 % cáscara de piñón manso, T3- 75 % de bagazo de caña de azúcar + 25 % cáscara de piñón manso, T4- 75 % cáscara de piñón manso + 25 % bagazo de caña de azúcar y T5- 50 % bagazo de caña de azúcar + 50 % de cáscara de piñón manso. Las briquetas fueron producidas con la ayuda de una briquetadera hidráulica a temperatura de 80 ± 2 ºC y presión de 140 kgf cm-2, durante cinco minutos. Se analizó densidad aparente, densidad energética, expansión volumétrica, resistencia dinámica y resistencia a la tracción por comprensión diametral. Briquetas confeccionadas con 100 % de cáscara de piñón manso presentaron mayor densidad energética, fueron más resistentes a la prueba de resistencia dinámica y a la tracción por compresión diametral, aunque presentaron mayor expansión volumétrica en relación a las briquetas con 50 % de bagazo de caña de azúcar + 50 % de cáscara de piñón manso
Automatic Metadata Creation for Supporting Interoperability Levels of Spatial Data Infrastructures
No full textQuantifying neutron-proton equilibration using molecular dynamics codes
No full textPrevious studies have quantified neutron-proton equilibration experimentally in dynamically deformed nuclei in heavy ion collisions (Jedele A. et al., Phys. Rev. Lett., 118 (2017) 062501; Rodriguez Manso A. et al., Phys. Rev. C, 95 (2017) 044604). The results showed the composition of the two heaviest fragments from the excited projectile-like fragment evolve exponentially with respect to its angle of rotation. Simulations using constrained molecular dynamics and anti-symmetrized molecular dynamics were utilized for different slope parameterizations to compare the experimental results. The results indicate better agreement with a softer interaction
Lip, oral cavity and pharyngeal cancer prevalence/incidence in less developed countries - systematic search and narrative review
No full textObjective. The aim of this study was to conduct a systematic review of the available literature
on the prevalence / incidence of labial, oral and pharyngeal cancer in the less developed countries and its approach from 2010-2020.
Methodology: A systematic review was performed on PubMed, EBSCO, Web-of-Science and
Scielo following the PRISMA statement. Articles were selected based on inclusion and exclusion criteria. The level of evidence was classified based on the Levels of evidence of the National Health and Medical Research Council.
Results: 8638 articles were obtained, duplicate article eliminated, but only four papers and one
database were included for final analysis, and were from Tanzania, Mozambique, Bangladesh,
and Nepal. Higher incidence/prevalence of LOCP was found for male and for middle age
groups.
Conclusion: The lip, oral and pharyngeal cancer LOCP incidence and prevalence showed increase values in low income countries, particularly for men and for middle age groups.Objetivo. O objetivo deste estudo foi realizar uma revisão sistemática da literatura disponível
sobre a prevalência/incidência de cancro labial, oral e faríngeo (LOCP) nos países menos desenvolvidos e a sua abordagem desde 2010-2020.
Metodologia. Foi realizada uma revisão sistemática através da PubMed, EBSCO, Web of Science e Scielo, seguindo a declaração PRISMA. A seleção dos artigos finais foi baseada em
critérios de inclusão e exclusão. O nível de evidência do trabalho foi avaliado com base nos
Níveis de evidência do Conselho Nacional de Saúde e Pesquisa Médica.
Resultados. Foram obtidos 8638 artigos, os artigos duplicados foram eliminados, e apenas quatro artigos e uma base de dados foram incluídos, com respeito à Tanzânia, Mozambique, Bangladesh e Nepal. Foi detetada uma maior incidência/prevalência LOCP em homens e para a
faixa etária adulta madura.
Conclusão. A incidência e prevalência de LOCP apresentaram valores crescentes em países de
baixa renda, principalmente para homens e meia-idade
Sustentabilidade empresarial nos relatórios integrados da WEG S.A (2018-2020)
No full textO presente trabalho é um estudo sobre a maneira pela qual o conceito de sustentabilidade vem
orientando o modo das empresas gerirem os seus negócios a partir de preocupações ambientais,
sociais e de governança (ASG), assim como essas preocupações têm gerado oportunidades para
alavancar os lucros das empresas. O referencial teórico deste TCC está dividido em duas partes,
a primeira discute a gênese da sustentabilidade empresarial e a sua relação com a gestão
ambiental explorando a contribuição de John Elkington para o desenvolvimento sustentável e
a segunda trata da responsabilidade social empresarial. Desse modo, o presente trabalho coloca
a seguinte questão-problema: Como o conceito de sustentabilidade tem orientado a forma de
demonstração dos resultados da instituição empresarial pesquisada? O objetivo geral do
presente trabalho é analisar o desempenho da WEG na adoção de medidas sustentáveis,
buscando entender como isso se relaciona com o seu crescimento no mercado. Entende-se que
uma empresa sustentável é aquela que compatibiliza igualdade social, cuidados com o
ecossistema e a eficácia econômica na busca de seus objetivos.The present work is a study on the way in which the concept of sustainability has been guiding
the way companies manage their businesses based on environmental, social and governance
(ESG), as well as these concerns have generated opportunities to leverage profits of the
companies. I divide the theoretical framework into two pieces, the first discusses the genesis of
corporate sustainability and its relationship with environmental management exploring John
Elkington's contribution to sustainable development and the second deals with corporate social
responsibility. Thus, the present work poses the following problem question: How has the
concept of sustainability guided the way in which the researched business institution
demonstrates results? The general objective of the present work is to analyze WEG's
performance in adopting sustainable measures, seeking to understand how this relates to its
growth in the market. With this, we realize that a sustainable company is one that reconciles
social equality, care for the ecosystem and economic efficiency in the pursuit of its goals.45 f
Eficácia da instrumentação subgengival com curetas, ultrassons e polimento a ar na etapa não cirúrgica do tratamento da periimplantite
No full textIntrodução: A peri-implantite é uma patologia crónica, inflamatória e infeciosa que afeta a mucosa que rodeia o implante. O tratamento não cirúrgico centra-se em instrumentação subgengival com curetas de titânio ou plástico, ultrassom com pontas especiais e aeropolimento com glicina ou eritritol para eliminar o biofilme.
Objetivos: Esta revisão sistemática tem como objetivo avaliar a eficácia da instrumentação subgengival no tratamento não cirúrgico da peri-implantite, comparando os ultrassons, as curetas e o polimento a ar.
Materiais e Metodologia: Foi efetuada uma pesquisa na base de dados PubMed, tendo sido selecionados 11 artigos que cumpriam os critérios de inclusão no estudo.
Resultados: As investigações incluídas estudaram o efeito de diferentes métodos não cirúrgicos no tratamento da peri-implantite e os seus resultados clínicos.
Discussão: Após a análise dos estudos mostra que o tratamento com ultrassons, curetas e aeropolimento não são suficientes para curar a peri-implantite. Embora o aeropolimento apresente melhores resultados, também não consegue tratar a doença de forma eficaz.
Conclusão: Os ultrassons, as curetas e o aeropolimento não são eficazes no tratamento não cirúrgico da peri-implantite. Apesar das boas caraterísticas do eritritol, este não tem, por si só, benefícios significativos.Introduction: Peri-implantitis is a chronic, inflammatory and infectious condition that affects the mucosa surrounding the implant. Non-surgical treatment centres on subgingival instrumentation with titanium or plastic curettes, ultrasound with special tips and aeropolishing with glycine or erythritol to eliminate biofilm.
Objective: This systematic review aims to evaluate the effectiveness of subgingival instrumentation in the non-surgical treatment of peri-implantitis, comparing ultrasound, curettes and air polishing.
Materials and Methodology: A search was carried out in the PubMed database and 11 articles were selected that met the inclusion criteria for the study.
Results: The studies evalueate the effect of different non-surgical methods in the treatment of peri-implantitis and their clinical results.
Discussion: after analysing the results the studies shows that treatment with ultrasound, curettes and aeropolishing is not enough to cure peri-implantitis. Although aeropolishing shows better results but it was not effective to treat the disease.
Conclusion: Ultrasound, curettes and aeropolishing are not effective in the non-surgical treatment of peri-implantitis. Despite the good characteristics of erythritol, it has no significant benefits on its own
A Graph Neural Network to Model Disruption in Human-aware Robot Navigation
No full textAutonomous navigation is a key skill for assistive and service robots. To be successful, robots have to minimise the disruption caused to humans while moving. This implies predicting how people will move and complying with social conventions. Avoiding disrupting personal spaces, people’s paths and interactions are examples of these social conventions. This paper leverages Graph Neural Networks to model robot disruption considering the movement of the humans and the robot so that the model built can be used by path planning algorithms. Along with the model, this paper presents an evolution of the dataset SocNav1 (Manso et al 2020) which considers the movement of the robot and the humans, and an updated scenario-to-graph transformation which is tested using different Graph Neural Network blocks. The model trained achieves close-to-human performance in the dataset. In addition to its accuracy, the main advantage of the approach is its scalability in terms of the number of social factors that can be considered in comparison with handcrafted models. The dataset and the model are available in a public repository (https://github.com/gnns4hri/sngnnv2)
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